Tuesday, 1 August 2023 - Monthly Climate Summary for Western Australia - Product code IDCKGC11R0

Western Australia in July 2023

Rainfall

• It was an unseasonably wet start to July in the Kimberley, following a wet end to June. Widespread daily rainfall of 15–50 mm was recorded on the 1st and 2nd, with isolated heavier falls of up to 90 mm, and several new July daily rainfall records.
• Argyle Aero recorded a monthly total of 65 mm, which was double its previous wettest July record set in 1986.
• A dozen or so sites in the Kimberley had their July records broken, or their wettest July for at least 20 years.
• Rainfall was below average for the western and southern half of WA, with July totals of 50–100 mm reported in the southwest between Jurien Bay and east of Albany, and along the Esperance coast. Monthly totals between 100 mm and 200 mm were recorded in the far southwest in and around Perth and to the south.
• For the South West Land Division(SWLD)as a whole, July rainfall was about 38 mm, the driest July since 2012 (29 mm).
• For WA as a whole, July rainfall was about 11.6 mm, which was 44% below the 1961–1990 average.

Temperature

• Mean maximum temperatures were above average in the southern and western WA, and close to average for the rest of the state.
• The state-wide averaged mean maximum temperature was 1.03 °C above the 1961–1990 average, but it was the coolest July since 2016(an anomaly of +0.34 °C).
• Mean minimum temperatures were below average for a large area from the western Pilbara and Gascoyne down to western Eucla district. Mean minimum temperatures were above average in the far south SWLD.
• The state-wide averaged mean minimum temperature was 0.19 °C below the 1961–1990 average, although July last year had cooler overnight temperatures(an anomaly of -0.62 °C).
• Wet and cloudy conditions resulted in a number of sites in the Kimberley having their coldest July day (lowest maximum temperature) on record on the 1st.
• The Great Southern forecast district observed 9 to 10 frosty nights with minimum temperatures at or below 2 °C, about the same number as in July last year.
• There were about 15 to 16 frosty nights in the eastern Central Wheat Belt forecast district, about 5 nights (50%) more than July last year.
• Eyre in the western Eucla district coast, recorded 10 freezing nights with minimum temperatures below 0 °C, which was double its July average (4.8 nights). A minimum temperature of -5.9 °C on the 17th was its lowest July temperature record, the third-lowest temperature in July on record for the state, and the lowest July temperature for 33 years since -6.5 °C was recorded at Murchison on 1 July 1990.

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top

Maps
	Observed	Anomaly	Decile rank
Total rainfall
Mean daily maximum temperatures
Mean daily minimum temperatures

Click on a map to show it full size in a pop-up window

* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top